<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box1 {
            width: 300px;
            height: 200px;
            background-color: aqua;
            border: 1px #f07373 solid;
        }

        .box2 {
            /* width: 300px; */
            height: 100px;
            padding: 10px;
            background-color: chocolate;
            border: 1px black solid;
            margin: 20px;
            /* padding: 10px;
            border: 1px black solid;
            margin: 20px; */
        }
    </style>
</head>

<body>
    <div class="box1">
        <div class="box2">k的解放军</div>
    </div>
</body>

</html>